Message boards : Number crunching : different credits for same unit - an unusual aspect of it
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atotos
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Message 5478 - Posted: 10 Dec 2004, 14:17:37 UTC
Last modified: 10 Dec 2004, 14:21:59 UTC

http://lhcathome.cern.ch/workunit.php?wuid=359639

I wonder why 3 people got credited 49.84 for this unit and other 3 got 99.69
I thought only 3 results were needed and that everybody would get the same number of credits... Quite puzzled...
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Message 5479 - Posted: 10 Dec 2004, 14:48:28 UTC
Last modified: 10 Dec 2004, 14:50:36 UTC

If I remember correct they announced some time ago that the credit-system was goning to change here at LHC.
You should get credit based on how well your result match the others.
Close enough and you get full credit, a bit of and you get less and so on...

Something like that anyway.
It's better for us to get some credit even if the result don't match completley because we did crunch and dedicate CPU-time for the project.

Look under the FAQ under 2.5 How and when do I get credit?
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Message 5480 - Posted: 10 Dec 2004, 15:30:37 UTC

Thanks a lot, that was really helpful!
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Message 5483 - Posted: 11 Dec 2004, 15:46:36 UTC
Last modified: 20 Dec 2004, 16:46:30 UTC

Got to do more reading........I hate giving bad info out......
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Message 5484 - Posted: 12 Dec 2004, 8:42:26 UTC - in response to Message 5479.  

> If I remember correct they announced some time ago that the credit-system was
> goning to change here at LHC.
> You should get credit based on how well your result match the others.
> Close enough and you get full credit, a bit of and you get less and so on...
>
> Something like that anyway.
> It's better for us to get some credit even if the result don't match
> completley because we did crunch and dedicate CPU-time for the project.
>
> Look under the FAQ under
> 2.5 How and when do I get credit?
>
I also remember this announcement. It also seems like they mentioned that late work could get partial credit, as long as it was returned before the database entry was cleared. That may be why some are getting zero when it seems like they should be getting something different.

John Keck -- BOINCing since 2002/12/08 --
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Message 5515 - Posted: 18 Dec 2004, 22:01:07 UTC - in response to Message 5478.  

The linux BOINC client is horribly misoptimized*. Therefore, benchmarks are lower than they should be. This brings the entire credit value down;

TIME TO CRUNCH WU X BENCHMARK VALUES = CLAIMED CREDIT

The lower claimed credit brings the granted credit down too; the granted credit is the median of claimed credits(used to be the lowest).

*Although the Boinc client is misoptimized, most boinc exceutables(number crunchers) are not.
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Message 5525 - Posted: 28 Dec 2004, 16:17:40 UTC - in response to Message 5515.  

> The linux BOINC client is horribly misoptimized*.
Actually it's the windows client benchmark code that is overoptomized. This is being fixed in the coming BOINC 4.5x.
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Message 5526 - Posted: 29 Dec 2004, 9:48:00 UTC - in response to Message 5525.  

> Actually it's the windows client benchmark code that is overoptomized. This is
> being fixed in the coming BOINC 4.5x.

Ever since I'm using the gcc 3.4.3 optimized BOINC 4.13 Core, my Linux Boxes score about equal to my few Windows machines.
Therefor, I'd say the Benchmark of the Linux BOINC 4.13 is indeed terribly un-optimized.

(The RAM-Benchmark is completely un-optimized across all Platforms for example, maybe they fix that as well sometime in the future)

Optimized Linux BOINC 4.xx Downloads (precompiled, ready-to-use) :

http://boinc.us.tt/
or
http://www.pperry.f2s.com/
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Message boards : Number crunching : different credits for same unit - an unusual aspect of it


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